If you think you can do it, you can.
The secret of getting ahead is getting started.
Well done is better than well said.
Always desire to learn something useful.
You never know what motivates you.
Go for it now. The future is promised to no one.
Expect problems and eat them for breakfast.
Quality is not an act, it is a habit.
I can, therefore I am.
Either you run the day or the day runs you.
I have taught history on the high school and college levels, and am or have been a lecturer at the Smithsonian, The National Institutes of Health, and numerous colleges and universities, mostly on science fiction and technology subjects.